Lubricant compressor



.ll 192 1,675,451l ab 3 8' E. w. DAvls LUBRICANT COMPRESSOR Filed April30, 1924 Patented July 3, 19,28.

UNITED STATES,

PATENT OFFICE.

ERNEST W. DAVIS, 0F OAK PARK, ILLINOIS, ASSIGN OR T0 THE BASSICKMANUFACTUR- ING COMPANY, 0F CHICAGO, ILLINOIS, A CORPORATION 0FDELAWARE.

LUBRICANI COMPRESSOR.

Application filed April 30,

My invention relates to improvements in lubricant compressors, and isparticularly concerned with the provision of a novel type of lubricantcompressorY Vdesigned particularly for supplying lubricant under highpressure to bearings to be lubricated. My improved compressor isintended to be used with a plurality of fittings, one of which issecured to each of the bearings to be lubricated, and comprises meansfor successively making sealed connection with the several fittings.

The objects of my present invention are;

First, to provide a compressor of the character described, by means ofwhich lubricant under comparativel high pressure can be easily andquickly orced into thebearngs.

Second, to provide a compressor, such as described, comprising a barrel,or low pressurecylinder, and a high pressure cylinder communicatintherewith, in combination with means or discharging the lubricant underhigh pressure from the high pressure cylinder.

Third, to provide a compressor of the character described, in which themeans for displacing or discharging the lubricant from the high pressurecylinder is connected' with a hollow member, adapted to conduct thelubricant from the high pressure cylinder to the fittings.

Fourth, to provide a compressor, embodying the features mentioned above,1n which the movement of the discharging element is eii'ected byrelative rotation between the high and low pressure cylinders.

Fifth, the rovision of a fcompressor of the constructlon described, inwhich the means for conducting the lubricant from the high pressurecylinder comprises a coupling member, adapted to be secured to a fittingby a movement substantially parallel with the axis of the high pressurecylinder; and

Sixth, to provide a compressor of the character described, which issimple in construction, economical to manufacture and easy to operate. f

Other objects of my invention will appear as this descriptionprogresses, reference b eing had to the accompanying drawings, 1n whichFigure 1 is a side elevation, partially 1n longltudinal section,illustrating certain features of my improved compressor;

1924. Serial No. 710,043.

Figure 2 is a bottom view, on an enlarged scale, of the coupling memberwhich I have illustrated in the present embodiment of my invention;

Figure 3 is an enlarged, sectional detail, showing certain portions ofmy improved coripressor in central, longitudinal section; an

Figure 4 is a view similar to Figure 3, but showing a modified form ofmy invention.

Referring, for the time being, to Figures 1 to 3, inclusive, my improvedcompressor illustrated therein comprises a barrel, or low pressurecylinder, 5 which is provided with the removable cap or closure 6,preferably connected therewith by a screwthreaded connection 7. A rod 8is secured to the cap 6 and projects inwardly substantially the entirelength of the barrel 5. This rod` is reduced in diameter adjacent itsinner end, as shown at 9, and terminates in a head 10, the purpose ofwhich will later be referred to. A piston P is reciprocably mounted inthe barrel 5 and comprises the sleeve 11, which is slidably mounted uponthe rod 8, the face plate 12, the follower plate 13, and the cup leather14. The last three elements are provided with central apertures fittingover the reduced portion 11 of the sleeve 11, and secured thereto byswedging over the end of this reduced` portion, as shown at 11. I preferto provide the cap 6 with an air vent 15, to permit the ready access ofair to the space between the piston P and the closure 6.

i The opposite end of the barrel 5 is reduced in diameter, as shown at16, and terminates in a sleeve 17, which forms a high pressure cylinder,and which is secured to the end 16 of the barrel 5 by means of thescrewthreaded connection 18, or any other suitable manner.

A metal washer 19 and a gasket 20, of fibre, felt, orother suitablematerial, are clamped between the end of the reduced portion 16 of thebarrel and the shoulder 21, formed on the sleeve 17. A valve 22 isadapted to seat against the washer 19, and is provided with the valvestem 22, which terminates in the head 23. A spiral compression spring24, confined between the valve 22 and head 23, yieldingly holds thevalve 22 Iin its closed osition.

A hollow lunger ro 25 extends through the outer en of the sleeve 17 andis provided with the external threads 26, which are here shown as doublethreads. These threads coact with corresponding internal threads 27,formed in the outer end of the sleeve or cylinder 17. The inner end ofthe plunger rod terminates in the plunger 28, which is recessed, asshown at 29, to receive the valve 22, and is provided with an oppositelydisposed recess 30, which forms a seat for the valve 31. This valve isyieldingly held against the seat 32 by means of the compression spring33, which is confined between the valve 31 and the adjacent end of thehollow plunger rod 25.

To prevent leakage in either direction past the plunger 28, I make useof the oppositely disposed cup leathers 34 and 35, which are mountedupon the plunger rod 25 and separated by the metal disk 36.

The outer end of the plunger rod 25 terminates in a cylindrical bodymember 37, the bore of which is internally threaded, as shown at 38. bythe threadedplug 39 and the opposite end thereof is closed by the cupleather 40, having the central perforation 41. The fiange 40 of this cupleather is confined between an externally threaded collar 42 and theinternally threaded wall of the body member 37. A compression spring 43,confined between the cap 39 and the bottom of the cup leather 40, tendsto convex the leather outwardly.

A pair of oppositely disposed flanges 44, formed integrally with thebody member 37, and spaced from the end 45 thereof, provide means formaking connection with a fitting, such as shown at 46 in Figure 1. Thisfitting comprises the head 47, which is adapted to be received betweenthe fianges 44 and the end 45 of the body member, and the neck portion48', which passes in between the oppositely `disposed edges of the twoflanges 44. The inner ends of these flanges are provided withprojections 48, which act as stop members to limit the movement of thecoupling member relatively to the fitting. The outer ends of the fianges44 areflared, or curved, as shown at 49, to facilitate the connection ofthe coupling member, just described, with the fitting.

In the use of my improved compressor, described above, the closure 6,the rod 8 and the piston "`P are first removed from the barrel 5. Inperforming this o eration, the cap 6 is unscrewed and pulle outwardly,thereby bringing the reduced end portion 9 of the rod 8 into the sleeve11, so as to permit air to fiow into the space at the rear of the pistonP and prevent the formation of a vacuum in the barrel as the piston P iswithdrawn. It will, of course, be understood that the head 10 engagesthe end of the sleeve 11 and causes the piston to be removed from thebarrel 5, along with the One end of this bore is closed i rod 8. Afterthe barrel has been substantially filled with lubricant, the cover 6 andits attached parts are replaced. The operator then engages the couplingmember of the compressor with the fitti by a movement of the couplingmember 1n a direction substantially parallel with the axis of thecompressor. In 'this manner, the coupling member and the fitting arebrought into the relative positions illustrated in Figure 3.

The operator thereupon oscillates the barrel 5 about its axis, rotatingit first in one direction and then in the other direction. It will beapparent that since the plunger rod 25 is connected with the fitting 46,through the coupling member, the plunger rod 25 will be held stationaryand that when the compressor is turned in one direction rela- 'tively tothe lunger rod, thevsleeve or cylinder 17 wil move toward the couplingmember or fitting, thereby causing the lubricant to be displaced fromthe high pressure cylinder through the valve seat 32, the hollowplungerrod 25, and the coupling member into the fitting, and that when thecompressor barrel -5 is rotated in the opposite direction, the sleeve 17will move away from the coupling member, thereby permitting the valve31' to close undel` the tension of the spring 33, and tending to createa vacuum in the high pressure cylinder between the plunger head 28 andthe valve 22. Atmospherlc pressure exerted upon the outer face of thepiston P will cause thelatter to move toward the high pressure cylindervof the compressor and force lubricant past the valve 22 into the`cylinder 17, and thereby priming the latter so that when the barrel isagain rotated in the opposite direction, lubricant will be dischargedfrom the high pressure cylinder, through the plunger rod 25 and thecoupling member into the fitting. It will, of course, be understood,that the i spring 24 is a very light spring which will not offer verymuch resistance to the openinof the valve 22.

first rotating the barrel 5 in one direction and then in the oppositedirection, the operator can feed successive charges of lubricant intothe fitting, until sufficient lubricant has been supplied' thereto, andby then pulling upon the barrel in the direction away from the fitting.can detach the coupling member from the fitting. By repeating theoperation just described, for each of the fittings of a mechanism, theoperator can easily and quickly supply all the bearings with lubricantunder pressure.

The modified form of my invention, illustra-ted in Figure 4, issimilar'to that described above, except that the cylinder 17 has a pairof oppositely' dis sed cam slots 50, formed in lts outer en forreceiving the pins or projections 51, extending outwardly from theplunger rod 25', which is lio i whic hollow the same as the plunger rod25, and connected with a coupling member 37 of the same construction.

The plunger at the inner end of the plun r rod 25 comprises the washer53, is preferably formed of leather, or other suitable material, theedge of which is confined by the metal band 54 which revents it frombecoming distorted. The ttom of the cup leather 55 contacts with thewasher 53, and the sides of this cup leather surround the outer end ofthe tubular displacing member 56, the inner end of which 1s flangedover, as shown at 57, to form a valve seat for the valve 58, and theother end of which is flanged over, as shown at 59. A compression spring60, confined between the flange 59 and the closure 58, provides meansfor yieldingly holding the latter on its seat. A beveled ring 61surrounds the tubular displacing element 56 and engages the edge of thecup leather 55. A compression spring 62, confined between the valve seat19 and the beveled ring 61, provides means for yieldingly ur ing theplunger construction, ]ust describe in anr outward d1- rection.

A cap 63, threaded onto the outer end of the sleeve 17', and comprisingthe inturned flange 64, provides means for reventing the ins-orprojections 51 from being completely is laced from the cam slots 50.

he construction just described operates 1n substantially the same manneras that illustrated in Figures 1 to 3, inclusive. When the compressorbarrel 5 is oscillated, the cam slots 50 ride back and forth uponthepins 51, thereby causing the plunger in the high pressure cylinder 17first to move inwardly, under the force of the plunger rod 25', and thento move outwardly, under the tension of the sprinA 62. Each time theplunger moves inwar ly, lubricant is displaced from the high pressurecylinder, past the valve 58, through the plunger rod 25 and couplingmember 37, into the fitting, and each time the plunger moves outwardly,yunder the tension of the spring 62, lubricant is forced past the valve22 by atmospheric pressure exerted upon the piston P, just as in the,construction previously described.

While I have described the details of construction of the preferredembodiment of my invention, it is to be clearly understood that myinvention is not limited to these details, but is capable of otheradaptations and modificationswithin the scope of the appended claims.

Having thus described my invention, what I claim is:

1. A lubricant compressor, comprising a barrel. a sleeve communicatinwith said barrel and formin a c linder, t e outer end of said sleevebeing internally threaded, an outwardly opening valve controllingcommunication between said barrel and said sleeve, a hollow plunger rodextending through the outer end of said sleeve and externally threadedfor co-acting with said threaded sleeve, a plunger at the in ner end ofsaid plunger rod, comprising an outwardly opening valve, and a couplingmember carried by the outer end of said plunger rod for making sealedconnection with a titting by a movement substantially parallel with saidlunger rod.

2. A lubricant compressor comprising a barrel, a sleeve communicatingwith said barrel and forming a cylinder, the outer end of said sleevebeing internally threaded, an outwardl opening valve controllingcommunication etween said .barrel and said sleeve, a hollow lungcr rodextending through the outer end) of said sleeve and externally threadedfor co-acting with said threaded sleeve, a plunger at the inner end ofsaid plun er rod, and a coupling member carried by t e outer end of saidplunger rod for making sealed connection with a fitting by a movementsubstantially parallel with said plunger rod.

3. A lubricant compressor, comprising a barrel, a sleeve communicatinwith said barrel and forming a cylinder, t e outer end of said sleevebeing internally threaded, a valve controlling communication betweensaid barrel and said sleeve, a hollow plunger rod extending through theouter endof said sleeve and externally threaded for co-acting with saidthreaded sleeve, a plunger at the inner end of said plunger rod, and acoupling member carried b the outer end of said plunger rod for ma ingsealed connection with a fitting.

4. A lubricant compressor, comprising a barrel terminating in a sleeve,a valve controlling communication between said barrel and said sleeve, aplunger reciprocably mounted in said sleeve, a hollow plunger rodconnected with said plunger and provided at its outer end with means formakin connection with a fitting, said plunger ro having a cam connectionwith said sleeve and means actuated by the rotation of Said sleeverelatively to said plunger rod for forcing lubricant from said barrelinto said sleeve.

5. A lubricant compressor, comprising a barrel terminating in a sleeve,a plunger reciprocabl mounted in said sleeve, a hollow plunger ro`connected with said plunger and provlded at its outer end with means formaking connection with a fitting, said plunger rod having a camconnection with said sleeve, and means actuated by the rotation of saidsleeve relatively to said plunger rod for forcing lubricant from saidbarrel into said sleeve.

6. rA lubricant compressor, comprisin a barrel terminating in a sleeve,a. hol w plunger rod threaded through the outer end of said sleeve andprovided at its inner end with means for displacing lubricant from saidsleeve, the outer end of said plunger rod being provided with means formaking connection with a fitting.

7. A lubricant compressor, comprising a. barrel terminating in a sleeve,means for displacing lubricant from` said sleeve, said m'eans and saidsleeve having inter-engaging cam surfaces, and means connected with saidlast named means for making connection with a fitting.

,8. A lubricant compressor comprising a barrel terminating in a sleeve,a plunger element carried by said sleeve and having a longitudinal boretherethrough, the outer end of said element having means for makingconnection with a tting and for pre- Venting relative rotation betweensaid fitting and element around the lunger axis, a check valve in thebore of sai element, co-operating means on said sleeve and said plun erfor causing relative reciprocation there etween upon relative rotationthereof.

In witness whereof, I hereunto subscribe my name this 25th day of April,1924.

ERNEST W. DAVIS.

